x86_main.asm
1
2
3
4
5
6
7
8
9
10
11
12
13
;
; x86 format converters for HERMES
; Some routines Copyright (c) 1998 Christian Nentwich (brn@eleet.mcb.at)
; This source code is licensed under the GNU LGPL
;
; Please refer to the file COPYING.LIB contained in the distribution for
; licensing conditions
;
; Most routines are (c) Glenn Fiedler (ptc@gaffer.org), used with permission
;
BITS 32
14
%include "common.inc"
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
SECTION .text
;; _ConvertX86:
;; [ESP+8] ConverterInfo*
;; --------------------------------------------------------------------------
;; ConverterInfo (ebp+..)
;; 0: void *s_pixels
;; 4: int s_width
;; 8: int s_height
;; 12: int s_add
;; 16: void *d_pixels
;; 20: int d_width
;; 24: int d_height
;; 28: int d_add
;; 32: void (*converter_function)()
;; 36: int32 *lookup
_ConvertX86:
push ebp
mov ebp,esp
; Save the registers used by the blitters, necessary for optimized code
pusha
mov eax,[ebp+8]
cmp dword [eax+4],BYTE 0
je endconvert
mov ebp,eax
mov esi,[ebp+0]
mov edi,[ebp+16]
y_loop:
mov ecx,[ebp+4]
jmp [ebp+32]
_x86return:
add esi,[ebp+12]
add edi,[ebp+28]
dec dword [ebp+8]
jnz y_loop
; Restore the registers used by the blitters, necessary for optimized code
popa
pop ebp
endconvert:
ret
;; Hermes_X86_CPU returns the CPUID flags in eax
_Hermes_X86_CPU:
pushfd
pop eax
mov ecx,eax
xor eax,040000h
push eax
popfd
pushfd
pop eax
xor eax,ecx
jz .L1 ; Processor is 386
push ecx
popfd
mov eax,ecx
xor eax,200000h
push eax
popfd
pushfd
pop eax
xor eax,ecx
je .L1
109
110
push ebx
111
112
mov eax,1
cpuid
113
mov eax,edx
115
pop ebx
116
117
118
.L1:
ret
119
120
121
122
%ifidn __OUTPUT_FORMAT__,elf
section .note.GNU-stack noalloc noexec nowrite progbits
%endif